Xylem Lab 970 User Manual

Operating manual
5
0
3
5
C
°
S/cm
µ
nLF
TP
Lab 970
Lab 970
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DRAFT: November 13, 2009
Laboratory conductivity meter
with automatic sensor recognition
Lab 970
Accuracy when going to
press
Warranty We guarantee the instrument described for 3 years from the date of
The use of advanced technology and the high quality standard of our instruments are the result of continuous development. This may result in differences between this operating manual and your instrument. Also, we cannot guarantee that there are absolutely no errors in this manual. Therefore, we are sure you will understand that we cannot accept any legal claims resulting from the data, figures or descriptions.
purchase. The instrument warranty covers manufacturing faults that are discovered within the warranty period. The warranty does not cover components that are replaced during maintenance work, e. g. batteries.
The warranty claim extends to restoring the instrument to readiness for use but not, however, to any further claim for damages. Improper handling or unauthorized opening of the instrument invalidates any warranty claim.
To ascertain the warranty liability, return the instrument and proof of purchase together with the date of purchase freight paid or prepaid.
CE conformity
Radio data transmission
Copyright
SI Analytics GmbH hereby declares that the Lab 970 meter is in compliance with the essential requirements and the other relevant provisions of Directive 1999/5/EC. The EC declaration of conformity can be requested from SI Analytics GmbH.
© 2009, SI Analytics GmbH
Reprinting - even in the form of excerpts - is only allowed with the explicit written authorization of SI Analytics GmbH. Printed in Germany.
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Lab 970
KONFORMITÄTSERKLÄRUNG DECLARATION OF CONFORMITY DÉCLARATION DE CONFORMITÉ
Wir erklären in alleiniger
Verantwortung, dass das
Produkt
Konduktometer
Lab 970
auf das sich diese Erklärung
bezieht, übereinstimmt mit
den Angaben im Kapitel
We declare under our sole
responsibility that the
product
Conductivity meter
Lab 970
to which this declaration
relates is in conformity with
the specifications in the
chapter
Nous déclarons sous notre seule responsabilité que le
produit
Conductimètre
Lab 970
auquel se réfère cette
déclaration est conforme aux
indications du chapitre
30. Oktober, October 30, 30 octobre 2005 AGQSF 0000-A104-01/091030
SI Analytics GmbH
Hattenbergstr. 10
D-55122 Mainz
Deutschland, Germany, Allemagne
Technische Daten
Konduktometer
Lab 970
30. Oktober 2009
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Lab 970
4
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Lab 970 Contents
Lab 970 - Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.3 Socket field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.4 Automatic sensor recognition . . . . . . . . . . . . . . . . . . . . . 11
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 14
3 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.1 Scope of delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.2 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.1 Switching on the meter . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.2 General operating principles . . . . . . . . . . . . . . . . . . . . . . 20
4.2.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . 20
4.2.2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.3.1 Measuring the conductivity. . . . . . . . . . . . . . . . . 22
4.3.2 Measuring the resistivity. . . . . . . . . . . . . . . . . . . 22
4.3.3 Measuring the salinity . . . . . . . . . . . . . . . . . . . . 23
4.3.4 Measuring the total dissolved solids (TDS) . . . . 24
4.3.5 Measuring with stability control . . . . . . . . . . . . . 25
4.4 Determining/setting up the cell constant [C] . . . . . . . . . . 26
4.4.1 Determining the cell constant (calibration). . . . . 26
4.4.2 Using the last calibrated cell constant . . . . . . . . 29
4.4.3 Setting the cell constant manually . . . . . . . . . . . 30
4.5 Setting the temperature compensation TC . . . . . . . . . . . 34
4.6 Downloading calibration data . . . . . . . . . . . . . . . . . . . . . 38
4.7 Transmitting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.7.1 Options for data transmission . . . . . . . . . . . . . . 40
4.7.2 Automatically downloading measurement datasets
at intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.7.3 RS232 interface . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.7.4 USB interface (device) . . . . . . . . . . . . . . . . . . . . 41
4.7.5 Operation with MultiLab pilot . . . . . . . . . . . . . . . 41
4.8 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
4.8.1 System settings . . . . . . . . . . . . . . . . . . . . . . . . . 44
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Contents Lab 970
4.8.2 Measurement settings . . . . . . . . . . . . . . . . . . . . 46
4.8.3 Interval for automatic data transmission . . . . . . . 48
4.9 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.9.1 Resetting the cell constant . . . . . . . . . . . . . . . . . 49
4.9.2 Resetting meter settings. . . . . . . . . . . . . . . . . . . 50
5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 53
5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
5.1.1 Replacing the batteries. . . . . . . . . . . . . . . . . . . . 53
5.2 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
5.3 Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
5.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.1 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.2 Measuring ranges, resolution, accuracy . . . . . . . . . . . . . 59
8 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
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Lab 970 Overview
0
5
2
0
3
5
C
°
S
/c
m
µ
nLF
TP
L
a
b
9
7
0
1
2
3

1Overview

The Lab 970 compact precision conductivity meter enables you to perform conductivity measurements quickly and reliably. The Lab 970 provides the maximum degree of operating comfort, reliability and measuring certainty for all applications. The proven procedures for determining or adjusting the cell constant support your work with the conductivity meter.
1 Keypad
2 Display
3 Socket field
Note
The meter is also available as part of an individual Set of equipment. You will find information on this and other accessories in the SI Analytics GmbH laboratory catalog or via the Internet.
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Overview Lab 970
MODE SC
CAL
MODE
CAL
SC

1.1 Keypad

In this operating manual, keys are indicated by brackets <..> . The key symbol (e.g. <OK>) generally indicates a short keystroke (under 2 sec) in this operating manual. A long keystroke (approx. 2 sec) is indicated by the underscore behind the key symbol (e.g.
<OK
_>).
<On/Off>: <On/Off
<MODE>: <MODE
<CAL>: <CAL
<SC>: <SC
<>: Increment values, scroll
_>:
_>:
_>:
_>:
Switch the meter on/off Resetting the determined cell constant
Select measured parameter Open setting menu for calibration and measurement
Call up calibration procedure Call up calibration data
Activate / deactivate stability control Set the interval for data transmission
8
<>: Decrement values, scroll
<OK>:
_>:
<OK
Confirm entries Open setting menu for system settings
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Lab 970 Overview
Time
Day.Month
Year
Baud
No.
Ident
1/cm
/K
%
8
88
8
8
8
8
8
°F
C
°
TDS
Sal
S/cm
mg/l
MW*cm
m
µ
LoBat
Tref25
Tref20
Auto
Store
ARng
Cal
RCL
nLF
Lin
AR
TP
-
Measured variable
ID sensor symbol
Measured value dis­play
Temperature dis­play, function display indicators, status dis­play indicators

1.2 Display

Temperature display,
function display
indicators, status
display indicators
[AR] Stability control is active
[ARng] Automatic range switch-over: meter measures with
highest possible resolution
[Cal] Calibration
[Lin] Linear temperature compensation
[LoBat] With battery operation: Batteries almost empty
[nLF] Nonlinear temperature compensation
[TP] Temperature measurement active
[Tref20] Reference temperature 20 °C
[Tref25] Reference temperature of 25 °C
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Overview Lab 970

1.3 Socket field

Connectors:
1 Conductivity measuring cell
2 Temperature sensor
3
4 USB interface
5 Power pack
6 RS 232 interface
CAUTION
Only connect sensors to the meter that cannot return any voltages or currents that are not allowed (> SELV and > current circuit with current limiting). Almost all measuring cells - in particular SI Analytics GmbH measuring cells - fulfill these conditions.
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Lab 970 Overview

1.4 Automatic sensor recognition

The automatic sensor recognition function enables
z operation of a sensor with different meters without recalibration
z operation of different sensors with a meter without recalibration
z to assign measurement data to a sensor
– measurement datasets are always downloaded to the interface
along with the sensor type and sensor series number
z to assign calibration data to a sensor
– calibration data is always downloaded to the interface along with
the sensor type and sensor series number
z automatic activation of cell constants with conductivity sensors
To be able to use the automatic sensor recognition function, you need a meter that supports the automatic sensor recognition (e.g. Lab 970) and a sensor (ID sensor) that is suitable for sensor recognition.
In ID sensors, sensor data is stored that clearly identifies the sensor. The sensor data is automatically transmitted to the meter by radio and used for sensor identification there.
Note
You can also operate non-ID sensors with the Lab 970 meter. In this case, however, you will not be able to use the advantages of the sensor recognition function.
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Overview Lab 970
ID sensor symbol
%
°F
/K
S/cm
m
µ
Tref20
Auto
Store
MW*cm
Time
Day.Month
Year
Baud
No.
Ident
ARng
Cal
RCL
Lin
AR
LoBat
1/cm
8
mg/l
8-
0
5
2
8
3
5
Tref25
nLF
TP
°
C
ID sensors SI Analytics GmbH ID sensors support the automatic sensor
recognition. "ID" is added to the designation of these sensors, e.g. electrode LF913T ID.
Note
Information on available ID sensors is given on the Internet or directly by SI Analytics.
ID sensors connected to the Lab 970 meter are identified by the ID sensor symbol on the display of the meter.
12
Sensor data from
ID sensors
ID sensors transmit the following sensor data
z Sensor type
z Sensor series number
z Calibration data
– Calibration date
– Calibration characteristics
– Calibration interval
The calibration data is updated in the ID sensor after each calibration procedure. The ID sensor symbol flashes while this is being done.
Note
The sensor must not be disconnected while the ID sensor symbol is flashing, as otherwise the calibration data will not be completely transmitted. The sensor will then have no valid calibration.
Note
If non-ID sensors are used, the calibration data is read out by the meter and stored in the meter.
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Lab 970 Safety

2 Safety

This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the meter. Consequently, all responsible personnel must read this operating manual before working with the meter. The operating manual must always be available within the vicinity of the instrument.
Target group The meter was developed for work in the laboratory.
Thus, we assume that, as a result of their professional training and experience, the operators will know the necessary safety precautions to take when handling chemicals.
Safety instructions Safety instructions in this operating manual are indicated by the
warning symbol (triangle) in the left column. The signal word (e.g. "Caution") indicates the level of danger:
Further notes
WARNING
indicates instructions that must be followed precisely in order to avoid possibly great dangers to personnel.
CAUTION
indicates instructions that must be followed precisely in order to avoid the possibility of slight injuries or damage to the instrument or the environment.
Note
indicates notes that draw your attention to special features.
Note
indicates cross-references to other documents, e.g. operating manuals.
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Safety Lab 970

2.1 Authorized use

Authorized use of the meter consists exclusively of the measurement of conductivity, temperature, salinity and TDS (total dissolved solids) in a laboratory. The technical specifications as given in chapter 7 T
ECHNICAL DATA
(page 57) must be observed. Only the operation and running of the meter according to the instructions given in this operating manual is authorized. Any other use is considered unauthorized.

2.2 General safety instructions

This instrument is constructed and tested in compliance with the IEC 1010 safety regulations for electronic measuring instruments. It left the factory in a safe and secure technical condition.
Function and
operational safety
The smooth functioning and operational safety of the meter can only be guaranteed if the generally applicable safety measures and the specific safety instructions in this operating manual are followed during operation.
The smooth functioning and operational safety of the meter can only be guaranteed under the environmental conditions that are specified in chapter 7 T
ECHNICAL DATA (page 57).
If the instrument was transported from a cold environment to a warm environment, the formation of condensate can lead to the faulty functioning of the instrument. In this event, wait until the temperature of the instrument reaches room temperature before putting the instrument back into operation.
CAUTION
The meter is only allowed to be opened by personnel authorized by SI Analytics GmbH.
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Lab 970 Safety
Safe operation If safe operation is no longer possible, the instrument must be taken out
of service and secured against inadvertent operation! Safe operation is no longer possible if the meter:
z has been damaged in transport
z has been stored under adverse conditions for a lengthy period of
time
z is visibly damaged
z no longer operates as described in this manual.
If you are in any doubt, please contact the supplier of the meter.
Obligations of the
purchaser
The purchaser of this meter must ensure that the following laws and guidelines are observed when using dangerous substances:
z EEC directives for protective labor legislation
z National protective labor legislation
z Safety regulations
z Safety datasheets of the chemical manufacturers.
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Safety Lab 970
16
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Lab 970 Commissioning

3 Commissioning

3.1 Scope of delivery

z Lab 970 laboratory meter
z Power pack
z 4 batteries 1.5 V Mignon type AA
z Z875 USB cable with A plug on B plug
z Transparent cover
z Operating manual
z CD-ROM with USB driver

3.2 Initial commissioning

Insert batteries
Perform the following activities:
z Insert batteries
z Switch on the meter
z Set the date and time
z Connect the power pack (for line power operation only).
1 Open the battery compartment (1) on the underside of the
meter.
2 Place four batteries (type Mignon AA) in the battery
compartment.
3 Close the battery compartment (1).
The date (day) flashes in the display.
4 Set the date and time according to page 42.
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Commissioning Lab 970
CAUTION
Make sure that the poles of the batteries are the right way round. The
± signs on the batteries must correspond to the ± signs in the
battery compartment. Only use leakproof alkaline manganese batteries.
Switching on the meter
Setting the date and
time
Connecting the power
pack
1 Switch on the meter with <On/Off>.
A display test is briefly displayed.
2 See page 44
You can either operate the measuring instrument with batteries or with the plug-in power supply. The plug-in power supply supplies the mea­suring instrument with low voltage (12 VDC). This saves the batteries.
CAUTION
The line voltage at the operating site must lie within the input voltage range of the original power pack (see page 57).
CAUTION
Use original power packs only (see page 57).
3 Insert the plug into the socket of the conductivity meter.
4 Connect the original power pack to an easily accessible power
outlet.
18
Note
You can carry out measurements without the power pack.
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Lab 970 Operation

4 Operation

4.1 Switching on the meter

1 Place the meter on a flat surface and protect it from intense
light and heat.
2 Press the <On/Off>
A display test is briefly displayed. Subsequently, the meter switches to the measuring mode (measured value display).
Note
The meter has an energy saving feature to avoid unnecessary battery depletion during battery operation. The energy saving feature switches off the meter if no key was pressed during the specified interval (setting the switch-off interval see page 44). The energy saving feature is not active:
z if the meter is supplied via the power pack or the USB interface
z automatic storingif the printer cable is connected (for external
printers).
key.
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Operation Lab 970

4.2 General operating principles

This section contains basic information of the operation of the Lab 970.

4.2.1 Operating modes

The instrument has the following operating modes:
z Measuring
The display indicates the measurement data in the measured value display
z Calibration
The display guides you thru a calibration procedure with calibration information
z Transmitting data
The meter transmits measuring data and calibration records to a serial interface automatically or manually.
z Configuration
The system menu or a sensor menu with submenus, settings and functions is displayed

4.2.2 Operation

Keys The meter is operated via keys. The keys can have different functions
with long or short keystrokes.
Functions Generally, with a short keystroke a function is carried out. A long
keystroke opens a setting menu.
In a setting menu, settings are selected with the <▲><▼> keys. A setting is confirmed with <OK>. With confirming, the setting is finished and the next setting is displayed.
Representation In this operating manual, keys are indicated by brackets <..> .
The key symbol (e.g. <OK>) generally indicates a short keystroke (under 2 sec) in this operating manual. A long keystroke (approx. 2 sec) is indicated by the underscore behind the key symbol (e.g.
<OK
_>).
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Lab 970 Operation

4.3 Measuring

Preparatory activities Perform the following preparatory activities when you want to measure:
1 Connect a measuring cell to the meter.
2 Adjust the temperature of the test solutions and measure the
current temperature if the measurement is made without a temperature sensor.
3 Calibrate or check the meter with the measuring cell.
4 Select the measured parameter with <MODE>.
CAUTION
When connecting an earthed PC/printer, measurements cannot be performed in earthed media as incorrect values would result. The RS232 and USB interfaces are not galvanically isolated.
Temperature sensor The temperature measurement is absolutely essential for a
reproducible conductivity measurement. If a temperature sensor is connected, it is indicated on the display by TP.
If you use a conductivity measuring cell without integrated temperature sensor, we recommend to use an external temperature sensor.
Note
The conductivity meter automatically recognizes the type of the temperature sensor used. Therefore, you can connect measuring cells with an NTC30 or Pt1000.
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Operation Lab 970
0
5
2
0
3
5
C
°
S/cm
µ
nLF
TP
Tref25

4.3.1 Measuring the conductivity

1 Perform the preparatory activities according to page 21.
2 Immerse the conductivity measuring cell in the test sample.
3 If necessary, scroll with <MODE> until the measured
parameter
4 Wait for a stable measured value.
ӕ with the unit mS/cm or µS/cm is displayed.
5 Measurement with stability control (see page 25).

4.3.2 Measuring the resistivity

1 Perform the preparatory activities according to page 21.
2 Immerse the conductivity measuring cell in the test sample.
3 If necessary, scroll with <MODE> until the measured
parameter
4 Wait for a stable measured value.
ӕ with the unit MOhm is displayed.
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Lab 970 Operation
2
1
2
3
2
3
C
°
Sal
nLF
TP
5 Measurement with stability control (see page 25).

4.3.3 Measuring the salinity

1 Perform the preparatory activities according to page 21.
2 Immerse the conductivity measuring cell in the test sample.
3 Using <MODE>, scroll as necessary until the measured
parameter Sal is displayed.
4 Wait for a stable measured value.
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5 Measurement with stability control (see page 25).
23
Operation Lab 970
0
0
1
3
5
3
TDS
mg/l
Tref25
nLF
7
8
0
3
1
3
TDS
mg/l
Tref25
nLF

4.3.4 Measuring the total dissolved solids (TDS)

1 Perform the preparatory activities according to page 21.
2 Immerse the conductivity measuring cell in the test sample.
3 Using <MODE>, scroll as necessary until the measured
parameter TDS is displayed.
4Using <▲><▼>, set the TDS factor (0.40 ... 1.00).
5 Wait for a stable measured value.
6 Measurement with stability control (see page 25).
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Lab 970 Operation

4.3.5 Measuring with stability control

The stability control function (SC) checks the stability of the measurement signal. The stability has a considerable effect on the reproducibility of the measured value.
1 With <SC>, activate the stability control function.
The AR function display indicator appears. The current measured value is frozen (hold function).
2 Start measurement with stability control with <OK>.
An AutoRead measurement is carried out to control the stability of the measured value. The AR display indicator flashes until a stable value is measured. The calibration process is finished when AR stops flashing. This measured value is downloaded to the interface.
3 If necessary, start the next measurement with stability control
with <OK>.
4 Press <MODE> or <SC>
to terminate the stability control.
Note
The current measurement with stability control can be terminated at any time (accepting the current value) by pressing <OK>.
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25
Operation Lab 970
L
CL
E
L
A
C

4.4 Determining/setting up the cell constant [C]

Why determine/set up
the cell constant?
Cleaning interval (Int.C) When the specified cleaning interval (Int.C) has expired, the Cln display
Due to aging, the cell constant slightly changes. As a result, an inexact measured value is displayed. Calibration determines the current value of the cell constant and stores this value in the instrument. Thus, you should calibrate at regular intervals. For non-ID sensors, the calibration data is stored in the meter. For ID sensors, the calibration data is stored in the sensor.
You can determine the cell constant of the conductivity measuring cell in the ranges 0.450 ... 0.500 cm
1.200 cm manually in the range 0.250 ... 2.500 cm Besides, the fixed cell constant 0.010 cm
indicator appears after the meter has been switched on and reminds you to clean the measuring cell. It is still possible to measure.
The cleaning interval (Int.C) is set to 180 days (d180) in the factory. You can change the interval (see page 46).
Note
In order to maintain the high measurement accuracy of the measuring system, clean the measuring cell and recalibrate after the cleaning interval has expired.
-1
by calibrating in the 0.01 mol/l KCl control standard or set it
-1
, 0.585 ... 0.715 cm-1 or 0.800 ...
-1
or 0.090 ... 0.110 cm-1.
-1
can be selected.
Determining the cell
(calibration in control
26
constant
standard)

4.4.1 Determining the cell constant (calibration)

1 Press <CAL> repeatedly until CAL CELL is displayed.
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Lab 970 Operation
2 Press <OK> or <CAL_> to confirm the selection of CAL
CELL.
3 Immerse the measuring cell in the control standard solution,
0.01 mol/l KCI.
4 Start the calibration with <OK>.
The determination of the cell constant with stability control starts. The display indicator flashes until there is a stable signal. The determined cell constant is displayed for 10 seconds. The meter stores the cell constant automatically. After this the meter switches to the measuring mode.
Stability control During calibration, the stability control is automatically activated.
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Note
If the error message E3 appears, refer to (
PAGE 55).
CHAPTER 6 WHAT TO DO IF...
Note
This method of automatically determining the cell constant by calibration in the 0.01 mol/l KCL control standard can only be used for measuring cells with cell constants in the ranges
0.450 ... 0.500 cm
-1
, 0.585 ... 0.715 cm-1 or 0.800 ... 1.200 cm-1.
27
Operation Lab 970
16.09.2005 08:53:54 Lab 970 02320025
CALIBRATION COND Cal Time : 16.09.2005 08:22:14 Cal Interval: 180d Cal Std.: 0.01 mol/l KCL
40.0 °C Conduct./Tref25: 1413µS/cm Cell Const : 0.975 1/cm Probe : +++
Calibration evaluation After the calibration, the meter automatically evaluates the current
status. The evaluation appears on the display.
Display Cell constant [cm
Status display indicator CAL.
in the range
0.450 ... 0.500 cm You are working with a correctly calibrated measuring
0.585 ... 0.715 cm
0.800 ... 1.200 cm
-1
]
-1
-1
-1
cell.
outside the ranges
E3
Eliminate the error according to
CHAPTER 6 WHAT TO DO IF...
(
PAGE 55).
0.450 ... 0.500 cm
0.585 ... 0.715 cm
or
0.800 ... 1.200 cm
-1
-1
-1
Calibration record When finishing a calibration, the new calibration values are stored.
For ID sensors, the calibration data is stored in the sensor (see page 11)
Note
The calibration record is automatically transmitted to the interface after calibrating.
Sample record:
If an ID sensor is used, the calibration record additionally names the sensor type and sensor series number (see page 11).
Downloading calibration
data
You can download the calibration data:
z to the display (see page 38)
z to the interface (see page 40)
28
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Lab 970 Operation
L
CL
E

4.4.2 Using the last calibrated cell constant

1 Press <CAL> repeatedly until CELL is displayed.
2 Press <OK> or <CAL_> to confirm the selection of CELL.
3 If necessary, press <CAL> repeatedly until CAL and the last
calibrated cell constant is displayed.
4 Confirm the selection with <OK> .
The displayed cell constant is used. The meter switches to the measured value display.
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29
Operation Lab 970
L
CL
E

4.4.3 Setting the cell constant manually

Note
The cell constant to be set must either be taken from the operating manual of the measuring cell or is printed on the measuring cell.
Range
0.250 ... 2.500 cm
-1
1 Press <CAL> repeatedly until CELL is displayed.
2 Confirm the selection with <OK> or <CAL_> .
The cell constant that was set last is displayed.
3Press <CAL> repeatedly until a cell constant in the range 0.250
... 2.500 cm
-1
is displayed.
30
4 Set the cell constant to be used with <▲><▼>, e.g.
0.614 cm
-1
.
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Lab 970 Operation
1/cm
4
0 1
6
0
8
6
S/cm
µ
Tref25
ARng
nLF
L
CL
E
5 Confirm the selection with <OK> .
The new cell constant is used from now on. The meter switches to the measured value display.
Range
0.090 ... 0.110 cm
-1
1 Press the <CAL> key repeatedly until CELL is displayed.
2 Confirm the selection with <OK> or <CAL_> .
3 Press <CAL> repeatedly until a cell constant in the range 0.090
... 0.110 cm
-1
is displayed.
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31
Operation Lab 970
1/cm
0
00
1
8
1
2
S/cm
µ
Tref25
ARng
nLF
1/cm
5
00
1
1
7
2
S/cm
µ
Tref25
ARng
nLF
L
CL
E
Selecting the cell
constant
0.010 cm
4 Set the cell constant to be used with <▲><▼>, e.g.
0.105 cm
5 Confirm the selection with <OK> .
The new cell constant is used from now on. The meter switches to the measured value display.
1 Press the <CAL> key repeatedly until CELL is displayed.
-1
-1
.
32
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Lab 970 Operation
1/cm
0
0 1
0
5
2
9
S/cm
µ
Tref25
ARng
nLF
2 Confirm the selection with <OK> or <CAL_> .
-1
3 Press <CAL> repeatedly until the cell constant 0.010 cm
displayed.
is
4 Confirm the selection with <OK> .
The meter switches to the measured value display.
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33
Operation Lab 970

4.5 Setting the temperature compensation TC

The calculation of the temperature compensation is based on the preset reference temperature, Tref 20 or Tref 25 (see page 43).
You can select one of the following temperature compensations:
z Nonlinear temperature compensation "nLF"
according to DIN 38404 or EN 27 888
z Linear temperature compensation "Lin"
with adjustable coefficient in the range 0.001 ... 3.000 %
z No temperature compensation
Note
Select the following temperature compensations given in the table according to the respective test sample:
/K
Application tips
Test sample Temperature compensation TC Display
indicator
Natural water (ground water, surface water, drinking water)
Ultrapure water nLF
Other aqueous solutions
Salinity (seawater)
nLF according to DIN 38404 EN 27 888
according to DIN 38404 EN 27 888
Set linear temperature coefficient
0.001 ... 3.000 %/K
Automatically nLF according to IOT
Sal,
34
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Lab 970 Operation
c
T
F
L
N
4
8
6
S/cm
µ
Tref25
ARng
nLF
Selecting the nonlinear
temperature
compensation
1 Press <CAL> repeatedly until tc is displayed.
2 Confirm the selection with <OK> or <CAL_> .
The temperature compensation that was set last is displayed.
3 Press <CAL> repeatedly until nLF is displayed.
ba75558e03 11/2009
4 Confirm the selection with <OK> .
The nonlinear temperature compensation is switched on. The meter switches to the measured value display. The selected temperature compensation appears as the status display.
35
Operation Lab 970
c
T
/K
%
0
20
0
1
4
2
2
S/cm
µ
Tref25
ARng
Lin
Selecting the linear
temperature
compensation
1 Press <CAL> repeatedly until tc is displayed.
2 Confirm the selection with <OK> or <CAL_> .
The temperature compensation that was set last is displayed.
3Press <CAL> repeatedly until the adjustable linear
temperature coefficient appears on the display.
36
4 Set the temperature coefficient with <▲><▼>, e. g. 1.880 %/K.
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Lab 970 Operation
c
T
5 Confirm the selection with <OK> .
The linear temperature compensation is switched on. The meter switches to the measured value display. The selected temperature compensation appears as the status display.
Switching off the
temperature
compensation
1 Press <CAL> repeatedly until tc is displayed.
2 Confirm the selection with <OK> or <CAL_> .
3 Press <CAL> repeatedly until the following display appears.
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4 Confirm the selection with <OK> .
The temperature compensation is switched off. The meter switches to the measured value display.
37
Operation Lab 970

4.6 Downloading calibration data

You can download calibration data:
z to the display
z to the interface (see page 40)
Download to display via
calibration menu
While the calibration data is being displayed you can:
z press <OK> to display further calibration data
(calibrated cell constant)
1 Press <CAL_> to display the calibration data.
The calibration date and calibrated cell constant are displayed consecutively for approx. 10 seconds each.
While the calibration data is being displayed you can:
z press <OK> to display further calibration data
(calibrated cell constant)
z press <CAL
_> to download the calibration data to the
interface

4.7 Transmitting data

38
The meter has two interfaces:
z RS232 interface (serial port)
z USB interface (device)
Via both interfaces, you can transmit data to a PC and update the meter software.
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Lab 970 Operation
The meter is supplied with power via the USB interface.
The RS232 interface enables to transmit data to an external printer.
Note
The relevant interface cable has to be connected if you want to download data to an interface (USB or RS232). It is not possible to download data to both interfaces (USB and RS232) at the same time. After connecting a meter to the USB socket the RS232 interface is inactive. The RS232 interface is active if no meter is connected to the USB interface.
CAUTION
The interfaces are not galvanically separated. When connecting an earthed PC/printer, measurements cannot be performed in earthed media as incorrect values would result.
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Operation Lab 970

4.7.1 Options for data transmission

Via the USB interface you can transmit data to a PC. Via the RS 232 interface, you can transmit data to a PC or an external printer.
The following table shows which data are transmitted to the interface in which way:
Data Control Operation / description
Current measured values
calibration records manual z During the display
4.7.2 Automatically downloading measurement datasets at
intervals
In order to automatically download to the interface measured values at certain time intervals, set the download interval (Int.2).
manual z With <OK>.
automatic, at intervals
automatic z After each measurement
automatic z On completion of a
z With <SC
can set the transmission interval (Int.2) (see page 40).
with stability control.
indication with <CAL (see page 38).
calibration procedure.
_>. Then you
_>
Setting the download
40
interval
The default setting for the download interval (Int.2) is OFF. To switch the function on, set an interval (5 s, 10 s, 30 s, 1 min, 5 min, 10 min, 15 min, 30 min, 60 min):
1 Press <SC_> to open the setting of the Int.2 interval.
2 If necessary, set an interval with <▲><▼>.
3 Close the setting with <OK>.
The download to the interface takes place at the specified interval.

4.7.3 RS232 interface

1 Connect the interface to the PC or printer via the cable Z390
(PC) or Z393 (ext. printer).
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Lab 970 Operation
RS 232
1
3
4
5
6
2
1 * 2 RxD 3 TxD 4 * 5 SGnd 6 CTS
* not used
2 If necessary, disconnect a connected USB cable from the
meter.
3 Set up the following transmission data on the PC/printer:
– Baud rate: selectable from 1200, 2400, 4800, 9600,
– Handshake: RTS/CTS + Xon/Xoff
PC only: – Parity: none
– Data bits: 8
– Stop bits: 1
Socket assignment
(RS232)
Installation of the USB
driver on the PC

4.7.4 USB interface (device)

Connect the interface to the PC via the supplied Z875 USB cable. The data output automatically switches to USB. The RS232 interface is deactivated.
System requirements of the PC for installation of the USB driver:
z PC with Pentium processor or higher with at least one free USB
connection and CD-ROM drive
z Windows 2000, XP, Vista.
1 Insert the supplied installation CD in the CD drive of your PC.
2 Install the USB driver on the PC.
Follow the Windows installation instructions as necessary.
3
The meter is listed as a virtual COM interface among the connections in the Windows instrument manager.

4.7.5 Operation with MultiLab pilot

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With the aid of the MultiLab pilot software, you can record and evaluate measuring data with a PC. The data is transmitted after the meter is connected to the RS232 serial interface or USB interface of a PC.
41
Operation Lab 970
Note
More detailed information can be found in the MultiLab pilot software operating manual.
42
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Lab 970 Operation

4.8 Settings

You can adapt the meter to your individual requirements. The settings are done in the following menus:
z System settings (<OK
– Baud rate (Baud)
– Switch-off interval (tOff)
– Date (Day.Month)
– Date (Year)
–Time (Time)
z Calibration and measurement settings (<MODE
– Reference temperature (Tref25 or Tref20)
– Temperature unit (°C / °F)
– Cleaning interval (Int.C [0 ... 999])
Note
You can exit the setting menu at any time by pressing <MODE>. Settings already modified and confirmed with <OK> are stored.
_>)
_>)
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43
Operation Lab 970
0
4 0
8
Baud
0
00
1
f
f
O
Time
t

4.8.1 System settings

The default setting is printed in bold.
Baud rate (Baud) 1200, 2400, 4800, 9600
Switch-off interval (.OFF) 10, 20, 30, 40, 50 min,
1, 2, 3, 4, 5, 10, 15, 20, 24 h
Date (Day.Month)Any
Date (Year) Any
Time (Time)Any
1 Open the menu for system settings with <OK_>.
The first system setting is displayed.
Baud rate (Baud)
Switch-off interval
(.OFF)
2 Set the required baud rate with <><> .
3 Confirm with <OK>.
.OFF, the setting of the switch-off interval is displayed.
44
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Lab 970 Operation
3
30
0
Day.Month
4 Set the switch-off interval with <▲><▼>.
5 Confirm with <OK>.
Day.Month, the setting of the date is displayed. The day display flashes.
Date and time
6 Set the date of the current day with <▲><▼> .
7 Confirm with <OK>.
The month display flashes.
8 Set the current month with <▲><▼> .
9 Confirm with <OK>.
Year, the setting of the year is displayed.
10 Set the year with <▲><▼> .
11 Confirm with <OK>.
The setting of the time is displayed. The hour display flashes.
12 Set the current hour with <▲><▼> .
13 Confirm with <OK>.
The minute display flashes.
14 Set the current minute with <▲><▼> .
15 Confirm with <OK>.
The system settings are completed. The meter switches to the measuring mode.
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45
Operation Lab 970
5
2
T
Tref25

4.8.2 Measurement settings

These settings apply to the determination of the cell constant and measurement (the default condition is printed in bold).
Reference temperature t25, t20
Temperature unit (UnI) °C, °F
Cleaning interval (Int.C) 0 ... 180 ... 999 d
Reference temperature
1 Open the menu for measurement settings with <MODE_>.
t25, the adjusted reference temperature is displayed.
Temperature unit (Uni)
46
2 Select the reference temperature with <▲><▼> .
3 Confirm with <OK>.
Uni, the setting of the unit of the temperature value is displayed.
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Lab 970 Operation
4 Using <><>, toggle between °C and °F.
5 Confirm with <OK>.
Int.C, the setting of the cleaning interval is displayed.
Cleaning interval (Int.C)
6 Set the interval with <▲><▼>.
7 Confirm with <OK>.
The measurement settings are completed. The meter switches to the measuring mode.
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47
Operation Lab 970
0
5
2
T
N
I

4.8.3 Interval for automatic data transmission

The interval for automatic data transmission serves to transmit the current measurement dataset to the interface at the specified interval.
Data transmission
interval
Data transmission interval (Int.2)
1 Press <SC_> to open the setting for the transmission interval.
Int.2, the setting of the transmission interval is displayed.
2 Press <><> to select an interval.
OFF, 5 s, 10 s, 30 s, 1 min, 5 min, 10 min, 15 min, 30 min, 60 min
3 Confirm with <OK>.
The setting of the interval for the data transmission to the interface is completed. The meter switches to the measuring mode.
48
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Lab 970 Operation
o
n
C
i
n
I

4.9 Reset

4.9.1 Resetting the cell constant

This function serves to erase the last determined cell constant. Subsequently, the meter uses the last manually adjusted cell constant. All other meter settings are retained.
Note
The measuring system is possibly not calibrated after a reset. Before measuring, make sure the meter uses the cell constant suitable for the measuring cell.
Resetting the cell
constant
1 Press <On/Off_> to open the menu for the reset of the cell
constant. Ini.C is displayed.
2 Press <><> to display no or YES.
YES: Reset the cell constant. no: Retain the cell constant.
3 Confirm with <OK>.
The menu is finished. The meter switches to the measuring mode.
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49
Operation Lab 970
o
n
t
i
n
I

4.9.2 Resetting meter settings

This function resets to the default condition meter settings. The relevant values are given on the following pages:
System settings page 44
Measurement settings page 46
The following settings are also reset to the default condition:
Setting Default settings
Resetting the meter
settings
Measured variable
Adjusted cell constant 0,650 1/cm
Temperature compensation nLF
Temperature coefficient of the linear temperature compensation
TDS factor 1.00
1 Switch on the meter with <On/Off>.
The display test appears briefly on the display.
2 During the display test, press <MODE> to open the menu for
the reset of the meter settings. Init is displayed.
ӕ mS/cm or µS/cm
2.000 %/K
50
3 Press <><> to display no or YES.
YES: Reset the meter settings. no: Retain the meter settings.
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Lab 970 Operation
4 Confirm with <OK>.
The menu is finished. The meter switches to the measuring mode.
Note
The measuring system is possibly not calibrated after a reset. Before measuring, make sure the meter uses the cell constant suitable for the measuring cell.
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51
Operation Lab 970
52
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Lab 970 Maintenance, cleaning, disposal
1

5 Maintenance, cleaning, disposal

5.1 Maintenance

The only maintenance activity required is replacing the batteries.
Note
See the relevant operating manuals of the measuring cells for instructions on maintenance.

5.1.1 Replacing the batteries

1 Open the battery compartment (1) on the underside of the
meter.
2 Remove the four batteries from the battery compartment.
3 Place four new batteries (type Mignon AA) in the battery
compartment.
4 Close the battery compartment (1).
The date (day) flashes on the display.
5 Set the date and time according to page 44.
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CAUTION
Make sure that the poles of the batteries are the right way round. The
± signs on the batteries must correspond to the ± signs in the
battery compartment. Only use leakproof alkaline manganese batteries.
53
Maintenance, cleaning, disposal Lab 970

5.2 Cleaning

Occasionally wipe the outside of the meter with a damp, lint-free cloth. Disinfect the housing with isopropanol as required.
CAUTION
The housing is made of synthetic material (ABS). Thus, avoid contact with acetone or similar detergents that contain solvents. Remove any splashes immediately.

5.3 Packing

This meter is sent out in a protective transport packing. We recommend: Keep the packing material. The original packing protects the instrument against damage during transport.

5.4 Disposal

Batteries This note refers to the battery regulation that applies in the Federal
Republic of Germany. We would ask end-consumers in other countries to follow their local statutory provisions.
Note
This instrument contains batteries. Batteries that have been removed must only be disposed of at the recycling facility set up for this purpose or via the retail outlet. It is illegal to dispose of them as household refuse.
54
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Lab 970 What to do if...

6 What to do if...

Error message
E1
Error message,
E3
Display of Cln
Display,
LoBat
Cause Remedy
– Measured value outside the
measuring range
Cause Remedy
– Measuring cell contaminated – Clean cell and replace it if
– Unsuitable calibration
solution
Cause Remedy
– Cleaning interval expired – Recalibrate the measuring
Cause Remedy
– Batteries almost empty – Replace the batteries (see
– Use suitable measuring cell
necessary
– Check calibration solutions
system
page 53)
Display
Instrument does not
react to keystroke
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to
Cause Remedy
– Time-out of the interface – Check the instrument that is
connected
Cause Remedy
– Operating condition undefined
or EMC load unallowed
– Processor reset:
Press and hold the <SC> key and switch the meter on
55
What to do if... Lab 970
You want to know which
Cause Remedy
software
version is in the
instrument
– E. g., a question by the service
department
– Switch on the meter.
During the display test, display the software version with <OK>.
56
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Lab 970 Technical data
Stand October 30, 2009Translation of the legally binding German version

7 Technical data

7.1 General data

Dimensions approx. 240 x 190 x 80 mm
Weight approx. 1.0 kg (without power pack, without stand)
Mechanical structure Type of protection IP 43
Electrical safety Protective class III Test certificates cETLus
Ambient
conditions
Power
supply
USB interface Automatic switch-over when a USB cable is connected.
Storage - 25 °C ... + 65 °C
Operation 0 °C ... + 55 °C
Climatic class 2
Batteries 4 x 1.5 V alkali-manganese batteries, Type
AA
Operational life Approx. 500 operating hours
Power pack (charging device)
Type USB 1.1 (device)
FRIWO FW7555M/09, 15.1432.500-00 Friwo Part. No. 1883259 Input: 100 ... 240 V ~ / 50 ... 60 Hz / 400 mA Output: 9 V = / 1.5 A Connection max. overvoltage category II Primary plugs contained in the scope of delivery: Euro, US, UK and Australian.
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57
Technical data Lab 970
FCC Class A Equipment Statement
Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.
Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
Stand October 30, 2009Translation of the legally binding German version
Guidelines
and norms used
EMC EC guideline 2004/108/EC
EN 61326-1 Class B FCC Class A
Instrument safety EC guideline 2006/95/EC
EN 61010-1 ANSI/UL 61010-1 CAN/CSA-C22.2 No. 61010-1
Radio data transmission
EC guideline 1999/5/EC EN 300 330-2 EN 50364 EN 60950-1
Climatic class VDI/VDE 3540
IP protection class EN 60529
58
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Lab 970 Technical data
Stand October 30, 2009Translation of the legally binding German version

7.2 Measuring ranges, resolution, accuracy

Measuring ranges,
resolution
Variable Measuring range Resolution
ӕ [µS/cm] 0.000 ... 1.999*
0.00 ... 19.99**
0.0 ... 199.9 0 ... 1999
ӕ [mS/cm] 0.00 ... 19.99
0.0 ... 199.9 0 ... 500
Resistivity [MOhm*cm]
SAL 0.0 ... 70.0
0.00 ... 19.99
0.0 ... 199.9 0 ... 1999
0.001
0.01
0.1 1
0.01
0.1 1
0.01
0.1 1
0.1 according to the IOT table
TDS [mg/l] 0 ... 1999
1 Factor can be set between 0.40 and
1.00
T [°C] 5.0 ... + 120.0 0.1
T [°F] + 23.0 ... + 248.0 0.1
* only possible with cells of the cell constant, 0.010 cm ** only possible with cells of the cell constant, 0.010 cm-1 or 0.090 ... 0.110 cm
Cell constants Cell constant C Values
Can be calibrated in the ranges
Adjustable 0.250 ... 2.500 cm
Reference temperature Reference
temperature
Adjustable 20 °C (Tr20)
0.450 ... 0.500 cm
0.585 ... 0.715 cm
0.800 ... 1.200 cm
0.090 ... 0.110 cm
0.010 cm-1 (fixed)
Values
25 °C (Tr25)
-1
-1
-1
-1
-1
-1
-1
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59
Technical data Lab 970
Stand October 30, 2009Translation of the legally binding German version
Accuracy (± 1 digit) Variable Accuracy Temperature of the test
sample
ӕ/ Temperature compensation
None (Off) ± 0.5 %
Nonlinear (nLF) ± 0.5 % 0 °C ... + 35 °C
according to EN 27 888
± 0.5 % + 35 °C ... + 50 °C
Extended nLF function according to WTW measurements
Linear (lin) ± 0.5 % + 10 °C ... + 75 °C
SAL / range
0.0 ... 42.0 ± 0.1 + 5 °C ... + 25 °C
± 0.2 + 25 °C ... + 30 °C
TDS [mg/l]
± 1
T [°C] / temperature sensor
NTC 30 ± 0.1
PT 1000 ± 0.3
Note
The accuracy values specified here apply exclusively to the meter. The accuracy of the measuring cell also has to be taken into account.
60
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Lab 970 Lists

8Lists

This chapter provides additional information and orientation aids.
Abbreviations The list of abbreviations explains abbreviations that appear on the
display or when dealing with the instrument.
Specialist terms The glossary briefly explains the meaning of the specialist terms.
However, terms that should already be familiar to the target group are not described here.
Index The index helps you to find the topics that you are looking for.
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61
Lists Lab 970
Abbreviations
Conductivity value
°C Temperature unit °Celsius
°F Temperature unit, °Fahrenheit
AR AutoRead
An AutoRead measurement is carried out for stability control (SC).
ARng Automatic range switch-over: meter measures with
highest possible resolution
AutoStore Automatic storage in memory
Baud Baud rate
C Cell constant cm
-1
Cal The measuring system is being calibrated or works
with a calibrated cell constant.
CELL Cell constant
disp Display
Data memory is displayed
E1 Overflow
Display range exceeded
E3 Error message
CHAPTER 6 WHAT TO DO IF... (PAGE 55)
see
Ident ID number
InI Initialization
Resets individual basic functions to the status they had on delivery
Int Interval
IOT International Oceanographic Tables
Lin Linear temperature compensation
LoBat Low Battery
Batteries are almost empty
62
nLF Nonlinear temperature compensation
SAL Salinity
SC Stability control (drift control)
SELV Safety Extra Low Voltage
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Lab 970 Lists
Sto CIr Clearing the memory
Sto disp Download data memory to display
Sto Full Memory location occupied
Sto Prt Download data memory to printer/interface
Tauto Automatic temperature measurement
TC Temperature coefficient
TDS Total dissolved solids
TP Temperature Probe;
Temperature measurement active
Tref 20/T20 Reference temperature 20 °C
Tref 25/T25 Reference temperature of 25 °C
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Lists Lab 970
Glossary
Adjusting To manipulate a measuring system so that the relevant value (e. g. the
displayed value) differs as little as possible from the correct value or a value that is regarded as correct, or that the difference remains within the tolerance.
AutoRange Name of the automatic selection of the measuring range.
Calibration Comparing the value from a measuring system (e. g. the displayed
value) to the correct value or a value that is regarded as correct. Often, this expression is also used when the measuring system is adjusted at the same time (see adjusting).
Cell constant, k Characteristic quantity of a conductivity measuring cell, depending on
the geometry.
Conductivity Short form of the expression, specific electrical conductivity.
It corresponds to the reciprocal value of the resistivity. It is a measured value of the ability of a substance to conduct an electric current. In water analysis, the electrical conductivity is a dimension for the ionized substances in a solution.
Measured value The measured value is the special value of a measured parameter to
be determined. It is given as a combination of the numerical value and unit (e. g. 3 m; 0.5 s; 5.2 A; 373.15 K).
Measured variable The measured parameter is the physical dimension determined by
measuring, e. g. pH, conductivity or DO concentration.
Molality Molality is the quantity (in Mol) of a dissolved substance in 1000 g
solvent.
Reference
temperature
Fixed temperature value to compare temperature-dependent measured values. For conductivity measurements, the measured value is converted to a conductivity value at a reference temperature of 20 °C or 25 °C.
Reset Restoring the original condition of all settings of a measuring system.
Resistance Short name for the electrolytic resistivity. It corresponds to the
reciprocal value of the electrical conductivity.
Resolution Smallest difference between two measured values that can be
displayed by a measuring instrument.
Salinity The absolute salinity S
of seawater corresponds to the relationship
A
of the mass of dissolved salts to the mass of the solution (in g/Kg). In practice, this dimension cannot be measured directly. Therefore, the practical salinity according to IOT is used for oceanographic monitoring. It is determined by measuring the electrical conductivity.
64
Salt content General designation for the quantity of salt dissolved in water.
Stability control Function to control the measured value stability.
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Lab 970 Lists
α
T
Ref
=
Meas
*
1
1+
a
(T - )
*
T
Ref
Standard solution The standard solution is a solution where the measured value is
known by definition. It is used to calibrate a measuring system.
TDS Total dissolved solids
Calculation: TDS (mg/l) = conductivity (µS) * TDS factor (mg/l*µS)
Temperature
Value of the slope of a linear temperature function.
coefficient
Temperature
compensation
Name of a function that considers the temperature influence on the measurement and converts it accordingly. Depending on the measured parameter to be determined, the temperature compensation functions in different ways. For conductimetric measurements, the measured value is converted to a defined reference temperature. For potentiometric measurements, the slope value is adjusted to the temperature of the test sample but the measured value is not converted.
Temperature function Name of a mathematical function expressing the temperature
behavior of a test sample, a sensor or part of a sensor.
Test sample Designation of the test sample ready to be measured. Normally, a test
sample is made by processing the original sample. The test sample and original sample are identical if the test sample was not processed.
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65
Lists Lab 970
66
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Lab 970 Lists
Index
A
Authorized use . . . . . . . . . . . . . . . . . . . . . . 14
B
Battery compartment . . . . . . . . . . . . . . 17, 53
Baud rate setting . . . . . . . . . . . . . . . . . . . . 44
C
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . 26
Calibration evaluation . . . . . . . . . . . . . . . . 28
Cell constant . . . . . . . . . . . . . . . . . . . . . . . 26
Cleaning interval . . . . . . . . . . . . . . . . . . . . 26
Connect the power pack . . . . . . . . . . . . . . 18
E
Energy saving feature . . . . . . . . . . . . . . . . 19
Error message . . . . . . . . . . . . . . . . . . . . . . 55
F
Firmware update . . . . . . . . . . . . . . . . . . . . 69
I
Initial commissioning . . . . . . . . . . . . . . . . . 17
Interval
Calibration . . . . . . . . . . . . . . . . . . . . . . 26
K
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
L
LoBat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
ORP voltage . . . . . . . . . . . . . . . . . . . . . . . 23
P
Precautions . . . . . . . . . . . . . . . . . . . . . . . . 13
Print . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
R
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
all meter settings . . . . . . . . . . . . . . . . . 50
Cell constant . . . . . . . . . . . . . . . . . . . . 49
Resolution setting . . . . . . . . . . . . . . . . . . . 46
RS232 interface . . . . . . . . . . . . . . . . . . . . . 41
S
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Sample display . . . . . . . . . . . . . . . . . . . . . . 9
Scope of delivery . . . . . . . . . . . . . . . . . . . . 17
Select a linear
Temperature compensation . . . . . . 34, 36
Setting the date . . . . . . . . . . . . . . . . . . 18, 45
Setting the time . . . . . . . . . . . . . . . . . . 18, 45
Socket field . . . . . . . . . . . . . . . . . . . . . . . . 10
Stability control . . . . . . . . . . . . . . . . . . . . . 25
T
TDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Temperature compensation . . . . . . . . . . . . 34
Nonlinear . . . . . . . . . . . . . . . . . . . . . . . 34
Select a linear . . . . . . . . . . . . . . . . . . . 34
Switch off . . . . . . . . . . . . . . . . . . . . 34, 37
Temperature sensor . . . . . . . . . . . . . . . . . 21
Total dissolved solids . . . . . . . . . . . . . . . . . 24
M
Measurement accuracy . . . . . . . . . . . . . . . 26
MultiLab pilot . . . . . . . . . . . . . . . . . . . . . . . 41
N
Nonlinear
Temperature compensation . . . . . . 34, 35
O
Operation location . . . . . . . . . . . . . . . . . . . 19
Operational safety . . . . . . . . . . . . . . . . . . . 14
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Lab 970

Appendix: Firmware update

General information With the "Update_Labxxx_MxxxP" program and a PC you can update
the firmware of the Lab 970 to the newest version.
z a free RS232 interface on your PC
z the RS232 cable Z390.
Program installation Install the firmware update program on your PC with the
"Install_Update_Labxxx_MxxxP_Vx_yy_English.exe" installation program.
Program start Start the "Update_Labxxx_MxxxP" program from the Windows start
menu. The selected interface is displayed on the left side of the status bar at the lower edge of the window.
You can change the language via the language menu.
Firmware update Proceed as follows:
1 Using the Z390 interface cable, connect the Lab 970 to the
serial interface (COM port) of the PC.
2 Make sure the Lab 970 is switched on.
3 To start the update process click the OK button.
The program automatically recognizes the used interface.
4 To go on, follow the instruction of the program.
During the programming process, a corresponding message and a progress bar (in %) appear. The programming process takes approx. two minutes. A terminatory message is displayed after a successful programming process. The firmware update is now completed.
5 Disconnect the meter from the PC.
The instrument is ready for operation.
After switching the meter off and on you can check whether the meter has taken over the new software version (see page 56).
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Telefon +49 (0) 61 31/66 5111 Telefax +49 (0) 61 31/66 5001 Email: support@
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